/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:38:26,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:38:26,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:38:26,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:38:26,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:38:26,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:38:26,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:38:26,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:38:26,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:38:26,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:38:26,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:38:26,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:38:26,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:38:26,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:38:26,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:38:26,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:38:26,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:38:26,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:38:26,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:38:26,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:38:26,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:38:26,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:38:26,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:38:26,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:38:26,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:38:26,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:38:26,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:38:26,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:38:26,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:38:26,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:38:26,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:38:26,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:38:26,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:38:26,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:38:26,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:38:26,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:38:26,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:38:26,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:38:26,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:38:26,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:38:26,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:38:26,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:38:26,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:38:26,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:38:26,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:38:26,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:38:26,504 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:38:26,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:38:26,504 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:38:26,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:38:26,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:38:26,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:38:26,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:38:26,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:38:26,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:38:26,506 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:38:26,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:38:26,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:38:26,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:38:26,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:38:26,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:38:26,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:38:26,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:38:26,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:38:26,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:38:26,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:38:26,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:38:26,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:38:26,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:38:26,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:38:26,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:38:26,827 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:38:26,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2020-10-14 05:38:26,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f60c718a3/369a81df242c479db32a157e2ef704ca/FLAG59d883804 [2020-10-14 05:38:27,322 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:38:27,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum_array-2.i [2020-10-14 05:38:27,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f60c718a3/369a81df242c479db32a157e2ef704ca/FLAG59d883804 [2020-10-14 05:38:27,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f60c718a3/369a81df242c479db32a157e2ef704ca [2020-10-14 05:38:27,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:38:27,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:38:27,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:27,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:38:27,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:38:27,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:27" (1/1) ... [2020-10-14 05:38:27,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:27, skipping insertion in model container [2020-10-14 05:38:27,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:27" (1/1) ... [2020-10-14 05:38:27,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:38:27,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:38:27,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:27,966 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:38:28,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:28,025 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:38:28,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28 WrapperNode [2020-10-14 05:38:28,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:28,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:38:28,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:38:28,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:38:28,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... [2020-10-14 05:38:28,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:38:28,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:38:28,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:38:28,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:38:28,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:38:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:38:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:38:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:38:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:38:28,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:38:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:38:28,233 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:38:28,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:38:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:38:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:38:28,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:38:28,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:38:28,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:38:28,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:38:28,550 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:38:28,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:28 BoogieIcfgContainer [2020-10-14 05:38:28,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:38:28,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:38:28,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:38:28,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:38:28,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:38:27" (1/3) ... [2020-10-14 05:38:28,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d429041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:28, skipping insertion in model container [2020-10-14 05:38:28,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:28" (2/3) ... [2020-10-14 05:38:28,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d429041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:28, skipping insertion in model container [2020-10-14 05:38:28,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:28" (3/3) ... [2020-10-14 05:38:28,562 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-10-14 05:38:28,572 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:38:28,579 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:38:28,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:38:28,610 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:38:28,610 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:38:28,610 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:38:28,610 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:38:28,610 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:38:28,611 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:38:28,611 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:38:28,611 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:38:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 05:38:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:38:28,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:28,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:28,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash -987676678, now seen corresponding path program 1 times [2020-10-14 05:38:28,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:28,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344669453] [2020-10-14 05:38:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:29,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:38:29,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:38:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 05:38:29,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:29,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:29,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:38:29,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:38:29,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:29,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:29,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:29,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:29,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:29,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:38:29,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:29,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:29,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:29,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:29,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344669453] [2020-10-14 05:38:29,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:29,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:38:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248977412] [2020-10-14 05:38:29,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:38:29,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:38:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:38:29,595 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-14 05:38:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:29,698 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-14 05:38:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:38:29,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 05:38:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:29,709 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:38:29,710 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:38:29,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:38:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:38:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:38:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:38:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:38:29,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-14 05:38:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:29,774 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:38:29,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:38:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:38:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:38:29,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:29,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:29,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:38:29,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -198032272, now seen corresponding path program 1 times [2020-10-14 05:38:29,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:29,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504833947] [2020-10-14 05:38:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:29,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:29,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:30,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:30,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:38:30,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:38:30,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-14 05:38:30,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:30,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:38:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:38:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:38:30,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:30,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:30,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:30,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:30,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:38:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:30,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:30,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:30,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504833947] [2020-10-14 05:38:30,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:30,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:38:30,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027015765] [2020-10-14 05:38:30,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:38:30,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:30,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:38:30,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:38:30,219 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-14 05:38:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:30,424 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-14 05:38:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:38:30,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-14 05:38:30,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:30,428 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:38:30,428 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:38:30,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:38:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:38:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-14 05:38:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:38:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-14 05:38:30,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2020-10-14 05:38:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:30,450 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-14 05:38:30,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:38:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-14 05:38:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:38:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:30,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:30,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:38:30,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 552406132, now seen corresponding path program 1 times [2020-10-14 05:38:30,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:30,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441364470] [2020-10-14 05:38:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:35,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:38:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:38:35,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4907 [2020-10-14 05:38:35,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:35,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:38:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:38:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:38:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:35,962 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 31 [2020-10-14 05:38:36,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:36,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:36,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:36,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:38:36,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:36,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:38:36,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441364470] [2020-10-14 05:38:36,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:36,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:38:36,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879839670] [2020-10-14 05:38:36,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:38:36,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:38:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:38:36,209 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-10-14 05:38:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:36,780 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-14 05:38:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:38:36,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-14 05:38:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:36,782 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:38:36,782 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:38:36,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:38:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:38:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-14 05:38:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:38:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-14 05:38:36,793 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2020-10-14 05:38:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:36,793 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-14 05:38:36,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:38:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-14 05:38:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:38:36,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:36,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:36,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:38:36,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash 941497038, now seen corresponding path program 1 times [2020-10-14 05:38:36,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:36,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897214422] [2020-10-14 05:38:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:36,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:37,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:40,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:41,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:41,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:41,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:38:41,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:38:41,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:38:41,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:41,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:41,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:38:41,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:38:41,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:38:41,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:42,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:42,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:42,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:42,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:42,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:38:42,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:42,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:42,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:42,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:42,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 05:38:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:42,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:42,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:38:42,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:42,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:38:42,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:42,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:42,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:38:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:38:42,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:38:42,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897214422] [2020-10-14 05:38:42,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:42,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:38:42,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180407769] [2020-10-14 05:38:42,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:38:42,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:38:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:38:42,231 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-14 05:38:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:42,808 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-14 05:38:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:38:42,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 05:38:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:42,812 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:38:42,812 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:38:42,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:38:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:38:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-14 05:38:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:38:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-14 05:38:42,821 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 33 [2020-10-14 05:38:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:42,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-14 05:38:42,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:38:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-14 05:38:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:38:42,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:42,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:42,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:38:42,823 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -636476818, now seen corresponding path program 2 times [2020-10-14 05:38:42,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:42,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169053944] [2020-10-14 05:38:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:42,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:43,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:44,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:44,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:44,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:47,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:38:47,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 05:38:47,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:38:47,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:47,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:47,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:38:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:38:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:38:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:38:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:47,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:47,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:47,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:47,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:47,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:47,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:47,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:47,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:47,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:47,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-14 05:38:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:47,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:47,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:47,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:38:47,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:38:47,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:47,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:38:47,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:47,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:38:47,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:38:47,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169053944] [2020-10-14 05:38:47,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:47,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:38:47,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483679165] [2020-10-14 05:38:47,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:38:47,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:38:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:38:47,981 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 8 states. [2020-10-14 05:38:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:48,231 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-14 05:38:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:38:48,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:38:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:48,236 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:38:48,236 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:38:48,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:38:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:38:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-14 05:38:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:38:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-14 05:38:48,255 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2020-10-14 05:38:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:48,257 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-14 05:38:48,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:38:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-14 05:38:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:38:48,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:48,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:48,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:38:48,261 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1410276218, now seen corresponding path program 3 times [2020-10-14 05:38:48,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:48,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260175486] [2020-10-14 05:38:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:48,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:51,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:51,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:53,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:53,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:38:53,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:38:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:38:53,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:53,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:38:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:38:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:38:53,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:53,954 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2020-10-14 05:38:54,360 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 36 [2020-10-14 05:38:54,491 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-14 05:38:54,776 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2020-10-14 05:38:54,970 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2020-10-14 05:38:55,154 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-14 05:38:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:55,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:55,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:55,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:55,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:55,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:55,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:55,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:55,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:55,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 05:38:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:55,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:55,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:38:55,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:55,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:38:55,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:55,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:38:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:38:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:38:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:38:55,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260175486] [2020-10-14 05:38:55,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:55,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:38:55,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945800099] [2020-10-14 05:38:55,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:38:55,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:55,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:38:55,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:38:55,286 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-14 05:38:55,646 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-14 05:38:55,932 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-14 05:38:56,106 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 05:38:56,325 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-14 05:38:56,493 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 05:38:56,675 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 05:38:57,094 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-14 05:38:57,402 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 05:38:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:57,540 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2020-10-14 05:38:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:38:57,545 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-14 05:38:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:57,548 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:38:57,548 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 05:38:57,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:38:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 05:38:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2020-10-14 05:38:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:38:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-14 05:38:57,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2020-10-14 05:38:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:57,569 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-14 05:38:57,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:38:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-14 05:38:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:38:57,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:57,572 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:57,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:38:57,572 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 52711692, now seen corresponding path program 4 times [2020-10-14 05:38:57,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:57,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019076269] [2020-10-14 05:38:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:58,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:01,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:01,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:02,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:02,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:02,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:39:02,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:39:02,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 05:39:02,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:02,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:02,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:39:02,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:02,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:39:02,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:03,004 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 24 [2020-10-14 05:39:03,340 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 45 [2020-10-14 05:39:03,596 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 49 [2020-10-14 05:39:03,817 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-10-14 05:39:03,989 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-14 05:39:04,141 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-14 05:39:04,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:04,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:04,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:04,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:04,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:04,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:04,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:04,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 05:39:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:04,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:04,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:04,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:39:04,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:04,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:39:04,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:04,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:39:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:39:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:39:04,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019076269] [2020-10-14 05:39:04,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:04,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:39:04,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579920742] [2020-10-14 05:39:04,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:39:04,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:04,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:39:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:39:04,246 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 13 states. [2020-10-14 05:39:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:05,462 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-14 05:39:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:39:05,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-14 05:39:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:05,464 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:39:05,464 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:39:05,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:39:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:39:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-14 05:39:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:39:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-14 05:39:05,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 47 [2020-10-14 05:39:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:05,479 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-14 05:39:05,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:39:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-14 05:39:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:39:05,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:05,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:05,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:39:05,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:05,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1352992246, now seen corresponding path program 5 times [2020-10-14 05:39:05,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:05,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220856845] [2020-10-14 05:39:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:10,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:10,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:39:10,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:39:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 05:39:10,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:10,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:39:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:39:10,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:11,088 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 29 [2020-10-14 05:39:11,374 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-10-14 05:39:11,622 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 36 [2020-10-14 05:39:11,968 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 49 [2020-10-14 05:39:12,338 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-10-14 05:39:12,670 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 62 [2020-10-14 05:39:13,049 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2020-10-14 05:39:13,372 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2020-10-14 05:39:13,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:13,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:13,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 05:39:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:13,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:39:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:13,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:39:13,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:39:13,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220856845] [2020-10-14 05:39:13,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:13,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:39:13,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698069892] [2020-10-14 05:39:13,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:39:13,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:39:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:39:13,540 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-10-14 05:39:14,534 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-14 05:39:14,859 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2020-10-14 05:39:15,055 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-14 05:39:15,369 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-14 05:39:15,796 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-14 05:39:15,957 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-14 05:39:16,203 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-14 05:39:16,424 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-14 05:39:16,738 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2020-10-14 05:39:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:16,775 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-10-14 05:39:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:39:16,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-14 05:39:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:16,783 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:39:16,783 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:39:16,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:39:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:39:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-14 05:39:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:39:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-14 05:39:16,801 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2020-10-14 05:39:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:16,805 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-14 05:39:16,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:39:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-14 05:39:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:39:16,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:16,807 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:16,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:39:16,809 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1015660970, now seen corresponding path program 6 times [2020-10-14 05:39:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:16,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343866568] [2020-10-14 05:39:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:16,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:16,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:21,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:21,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:39:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:39:21,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0